DIY Vernier Cam Pulley?

[jules696]

has anyone made one before or found any info on them,
i can't seem to find anything!!
i have a rough idea on how to do it just interested on reading up on it.

and yar, i don't wanna be paying £125 for one!!

[Davenger]

I'd want to be using a tried and tested off the shelf jobbie personally.
If it lets go, your valves are screwed at the very least, depending on the car.
£125 is a lot less than the cost of re-building your engine and replacing a load of internal components

[Deleted]

Someone on here made one for a Beetle if I recall. Don't know if it ever got used or not though.

He cut the wheel into an outside and an inside and made a snug fitting disc for the middle. Bolted tight to one part, slotted holes in the other so it could move +/- a few degrees and that was it. He cut his disc by hand but I'd put it on a lathe to make sure it was concentric.

[gn3dr]

Here's a few pics I saved from the web a few years ago - these were for a Suzuki Swift Gti. Definitely would need a lathe to do properly.

[retrowagen1234]

Sept 3, 2009 12:10:47 GMT Jonny69 said:

Someone on here made one for a Beetle if I recall. Don't know if it ever got used or not though.

He cut the wheel into an outside and an inside and made a snug fitting disc for the middle. Bolted tight to one part, slotted holes in the other so it could move +/- a few degrees and that was it. He cut his disc by hand but I'd put it on a lathe to make sure it was concentric.

for a newbie? original bugs are pushrod ohv or am i being completely dense

[gasserjay]

Sept 3, 2009 12:58:19 GMT @retrowagen1234 said:

Sept 3, 2009 12:10:47 GMT Jonny69 said:

Someone on here made one for a Beetle if I recall. Don't know if it ever got used or not though.

He cut the wheel into an outside and an inside and made a snug fitting disc for the middle. Bolted tight to one part, slotted holes in the other so it could move +/- a few degrees and that was it. He cut his disc by hand but I'd put it on a lathe to make sure it was concentric.

for a newbie? original bugs are pushrod ohv or am I being completely dense

Your being dense they've still got a cam gear.

[whitbytom]

I think Broke4Speed did it on his beige mk1 Golf. Have a look for his build thread.

[retrowagen1234]

Sept 3, 2009 13:10:51 GMT gasserjay said:

Sept 3, 2009 12:58:19 GMT @retrowagen1234 said:

for a newbie? original bugs are pushrod ohv or am I being completely dense

Your being dense they've still got a cam gear.

yeah but you'd have to split the case to adjust that?

if your going to the extent of splitting it down anyway you might as well take the simple option of knocking it round a tooth lol

[spiny]

Sept 3, 2009 13:10:51 GMT gasserjay said:

Sept 3, 2009 12:58:19 GMT @retrowagen1234 said:

for a newbie? original bugs are pushrod ohv or am I being completely dense

Your being dense they've still got a cam gear.

but the cam is in the case, it doesn't have an external pulley - it has a cog which meshes with another cog on the crak.

all the external pulley does is drive the alt.

[retrowagen1234]

exaclty.... unless you have a realy rare ohv cam setup that someone but cant remember who made in the late 70's

[gasserjay]

Sept 3, 2009 15:43:54 GMT spiny said:

Sept 3, 2009 13:10:51 GMT gasserjay said:

Your being dense they've still got a cam gear.

but the cam is in the case, it doesn't have an external pulley - it has a cog which meshes with another cog on the crak.

all the external pulley does is drive the alt.

Just because it's inside the case dosen't make any difference
if you want to adjust the cam timing that's what you do.
Many race engine builders build engines dyno them and then
pull them apart to change cams or alter cam timing.
You just want a pretty pulley to look at.

[trannyman]

If it has a woodruff key that looks to be in good condition on removal, just leave it out.

Make sure the faces between the cam and pulley are clean, the bolt is in good condition and torqued up properly. The woodruff key is there to time the engine up, not to hold its position while running.

1 x free infinitely adjustable pulley wheel with OEM looks. Winner.

[Deleted]

Sept 3, 2009 16:20:11 GMT @retrowagen1234 said:

exaclty.... unless you have a realy rare ohv cam setup that someone but cant remember who made in the late 70's

I did say 'if I recall', which I clearly haven't.

I have a vernier on my Ford OHV to time the cam in properly and you could put one on an older sidevalve if you wanted adjustment on the cam timing. Doesn't matter where the valves are, a Beetle engine surely still has the cam driven off the crank with a gear bolted on the front? So you could turn it into a vernier by splitting it...

[Dorset_Clive]

A cheap option is offset dowels - Dave Andrews (K-series legend) used to sell them. Basically you have to identify the amount of adjustment required and then get the appropriate offset dowels. I'm sure it used to be on his web page kengine.dvapower.com/ but I couldn't find it with a quick scan